forces will be in the lead, no longer u.s. forces. as our pentagon correspondent, jim miklaszewski reminds me, they will still very much be in harm's way in afghanistan and the contentious question of how many troops wil be left behind by the united states after 2014 is still very much the subject of negotiations, more on all of this tonight, on nbc nightly news with brian williams and on "meet the press" on sunday, my guest, colin powell talking about the war and other foreign policy issues on the president's second term. until then, have a good afternoon, i'm david gregory in washington. >>> it has been dubbed the most technologically advanced airliner in the skies, but this morning, new concerns as federal officials announce an investigation into boeing 787 dreamliner, hear how boeing is responding. >>> that didn't stop the celebration as san jose welcomed its first dreamliner flight this morning. what the new flight means for silicon valley, you're watching nbc bay area news. >>> good morning, and thanks for being with us, i'm lara. >>. and john kelly is off today. it has been